998724 has 12 divisors (see below), whose sum is σ = 2330384. Its totient is φ = 332904.

The previous prime is 998717. The next prime is 998737. The reversal of 998724 is 427899.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

998724 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41602 + ... + 41625.

2⁹⁹⁸⁷²⁴ is an apocalyptic number.

It is an amenable number.

998724 is an abundant number, since it is smaller than the sum of its proper divisors (1331660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998724 is a wasteful number, since it uses less digits than its factorization.

998724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83234 (or 83232 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 998724 is about 999.3617963480. The cubic root of 998724 is about 99.9574485630.

It can be divided in two parts, 9987 and 24, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 998724 in words is "nine hundred ninety-eight thousand, seven hundred twenty-four".